Product comparison · 2 pcs/workstations

Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz vs Lenovo ThinkCentre S51 P4 531 3.0GHz

34specifications compared
4differ
30identical
64known for one product only

Key differences

The Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has 0.2 GHz more processor frequency than the Lenovo ThinkCentre S51 P4 531 3.0GHz (3.2 GHz vs 3 GHz). The Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has 40 GB more total storage capacity than the Lenovo ThinkCentre S51 P4 531 3.0GHz (80 GB vs 40 GB).

Processor frequency
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:3.2 GHz
- ThinkCentre S51 P4 531 3.0GHz:3 GHz
Total storage capacity
- ThinkCentre A51 Pentium 4 640 HT 3.2GHz:80 GB
- ThinkCentre S51 P4 531 3.0GHz:40 GB

Side by side

Differences highlightedShow differences only

Comparison of ThinkCentre A51 Pentium 4 640 HT 3.2GHz, ThinkCentre S51 P4 531 3.0GHz
98 specifications	A Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz View product	B Lenovo ThinkCentre S51 P4 531 3.0GHz View product
Processor1 differ
Processor modelKnown for one	640	Unknown — not stated by the source
Processor coresKnown for one	1	Unknown — not stated by the source
Processor threadsKnown for one	2	Unknown — not stated by the source
Processor frequencyDiffers	3.2 GHz	3 GHz
Processor cacheKnown for one	2 MB	Unknown — not stated by the source
Processor cache typeKnown for one	L2	Unknown — not stated by the source
Bus typeKnown for one	FSB	Unknown — not stated by the source
FSB ParityKnown for one	No	Unknown — not stated by the source
Processor lithographyKnown for one	90 nm	Unknown — not stated by the source
Processor operating modesKnown for one	64-bit	Unknown — not stated by the source
Processor codenameKnown for one	Prescott	Unknown — not stated by the source
Thermal Design Power (TDP)Known for one	84 W	Unknown — not stated by the source
TcaseKnown for one	66.6 °C	Unknown — not stated by the source
PCI Express slots versionKnown for one	2.0	Unknown — not stated by the source
Processor socketKnown for one	LGA 775 (Socket T)	Unknown — not stated by the source
Number of Processing Die TransistorsKnown for one	169 M	Unknown — not stated by the source
Processing Die sizeKnown for one	135 mm²	Unknown — not stated by the source
CPU multiplier (bus/core ratio)Known for one	16	Unknown — not stated by the source
Processor core voltage (AC)Known for one	1.25 - 1.388 V	Unknown — not stated by the source
Maximum internal memory supported by processorKnown for one	32 GB	Unknown — not stated by the source
Memory types supported by processorKnown for one	DDR3-SDRAM	Unknown — not stated by the source
Memory clock speeds supported by processorKnown for one	1066 MHz	Unknown — not stated by the source
Memory bandwidth supported by processor (max)Known for one	17 GB/s	Unknown — not stated by the source
ECC supported by processorKnown for one	No	Unknown — not stated by the source
Memoryidentical
Memory channelsKnown for one	Dual-channel	Unknown — not stated by the source
Storage1 differ
Total storage capacityDiffers	80 GB	40 GB
HDD speedKnown for one	7200 RPM	Unknown — not stated by the source
Graphicsidentical
On-board graphics cardKnown for one	Yes	Unknown — not stated by the source
On-board graphics card familyKnown for one	Intel® HD Graphics	Unknown — not stated by the source
On-board graphics card modelKnown for one	Intel® HD Graphics	Unknown — not stated by the source
Number of displays supported (on-board graphics)Known for one	2	Unknown — not stated by the source
On-board graphics card base frequencyKnown for one	850 MHz	Unknown — not stated by the source
On-board graphics card dynamic frequency (max)Known for one	1100 MHz	Unknown — not stated by the source
Video adapter resolutionKnown for one	2048x1536 16777216 colors	Unknown — not stated by the source
Optical driveidentical
CD read speedKnown for one	48x	Unknown — not stated by the source
CD write speedKnown for one	48x	Unknown — not stated by the source
CD rewrite speedKnown for one	32x	Unknown — not stated by the source
Software1 differ
Bundled softwareDiffers	Lotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium (license), Access program, IBM Director Agent (web deliverable), ThinkVantage Client Security Software (web-downloadable), ThinkVantage Rescue and Recovery with Rapid Restore, Norton AntiVirus 2004 OEM Version, PC Doctor diagnosti	Lotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium (license), Access Program 4.0; IBM Client Sotware; Rescue and Recovery; IBM Director, Norton AntiVirus 2004 OEM Version, PC Doctor diagnostics
Processor special featuresidentical
CPU configuration (max)Known for one	1	Unknown — not stated by the source
Embedded options availableKnown for one	No	Unknown — not stated by the source
Enhanced Intel SpeedStep TechnologyKnown for one	Yes	Unknown — not stated by the source
Execute Disable BitKnown for one	Yes	Unknown — not stated by the source
Idle StatesKnown for one	No	Unknown — not stated by the source
Intel 64Known for one	Yes	Unknown — not stated by the source
Intel Clear Video TechnologyKnown for one	No	Unknown — not stated by the source
Intel Demand Based SwitchingKnown for one	No	Unknown — not stated by the source
Intel Enhanced Halt StateKnown for one	No	Unknown — not stated by the source
Intel Rapid Storage TechnologyKnown for one	No	Unknown — not stated by the source
Intel Trusted Execution TechnologyKnown for one	No	Unknown — not stated by the source
Intel Virtualization Technology (VT-x)Known for one	No	Unknown — not stated by the source
Intel Virtualization Technology for Directed I/O (VT-d)Known for one	No	Unknown — not stated by the source
Intel® AES New Instructions (Intel® AES-NI)Known for one	No	Unknown — not stated by the source
Intel® Clear Video HD Technology (Intel® CVT HD)Known for one	No	Unknown — not stated by the source
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)Known for one	No	Unknown — not stated by the source
Intel® InTru™ 3D TechnologyKnown for one	No	Unknown — not stated by the source
Intel® Insider™Known for one	No	Unknown — not stated by the source
Intel® Wireless Display (Intel® WiDi)Known for one	No	Unknown — not stated by the source
Processor ARK IDKnown for one	27480	Unknown — not stated by the source
Processor package sizeKnown for one	37.5 x 37.5 mm	Unknown — not stated by the source
Supported instruction setsKnown for one	SSE4.1/4.2	Unknown — not stated by the source
Thermal Monitoring TechnologiesKnown for one	Yes	Unknown — not stated by the source
Intel® Turbo Boost TechnologyKnown for one	No	Unknown — not stated by the source
Intel® Hyper Threading Technology (Intel® HT Technology)Known for one	Yes	Unknown — not stated by the source
Intel® Quick Sync Video TechnologyKnown for one	No	Unknown — not stated by the source
Intel® My WiFi Technology (Intel® MWT)Known for one	No	Unknown — not stated by the source
Intel® Anti-Theft Technology (Intel® AT)Known for one	No	Unknown — not stated by the source
Conflict-Free processorKnown for one	No	Unknown — not stated by the source
Other features1 differ
Security featuresDiffers	-Boot without keyboard or mouse -Configuration password -Diskette Boot inhibit -Diskette I/O control -Hard disk drive password -Hard drive I/O control -Parallel port I/O control -Power on password -Security slot (for attachment of optional cable lock) -Serial port I/O control -U-Bolt anchoring featu	-Boot without keyboard or mouse -Configuration password -Diskette Boot inhibit -U-Bolt anchoring feature -Serial port I/O control -Hard drive I/O control -Parallel port I/O control -Power on password -Security slot (for attachment of optional cable lock) -Hard disk drive password -Diskette I/O contr

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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